.classroom {
  flex-direction: column;
  background: #1a1a1a;
  height: calc(100vh - 0px);
  width: calc(100vw - 0px);
  min-width: 990px;
  .nav-container {
    padding: 0 10px;
    height: 48px;
    background-color: #303133;
    .nav-title {
      font-size: 14px;
      color: #fff;
    }
    .nav-center {
      .time {
        font-size: 13px;
        font-weight: 400;
        color: #FFFFFF;
        line-height: 20px;
      }
    }
    .nav-menu {
      .icon {
        color: #fff;
        height: 24px;
        cursor: pointer;
        display: flex;
        justify-content: center;
        align-items: center;
        margin-left: 15px;
      }
      .icon-over {
        font-size: 13px;
        padding: 0px 6px;
        background: #f54030;
        border-radius: 2px;
        .edu-icon-jieshu {
          margin-right: 3px;
        }
      }
      .icon-close {
        width: 24px;
        font-size: 16px;
      }
    }
  }
  .room-container {
    flex: 1;
    flex-direction: column;
  }
  .live-container {
    flex: 1 1;
  }
  .main-container {
    flex: 1;
  }
  .live-board {
    flex-direction: column;
    background-color: #2f2f2f;
  }
  .live-video {
    background-color: #303133;
    margin-bottom: 5px;
  }
}

.agora-video-view.show-placeholder {
  .video-profile {
    z-index: 9;
    background-color: rgb(139, 144, 146);
  }
  .teacher-placeholder,
  .student-placeholder {
    z-index: 9;
  }
  .agora-rtc-video {
    visibility: hidden;
  }
}

.video-profile {
  z-index: 3;
  width: 100%;
  height: 24px;
  position: absolute;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  .account {
    margin-left: 10px;
    line-height: 14px;
    font-size: 12px;
    color: #fff;
  }
}

.agora-video-view {
  margin: 0px 3.33px;
  background-color: #666666;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  width: 237px;
  height: 132px;
  position: relative;
  overflow: hidden;
  .rotateY180deg {
    transform: rotateY(180deg);
  }

  .media-btn {
    display: flex;
    justify-content: space-between;
    margin-right: 10px;

    .icon {
      color: #fff;
      font-size: 14px;
      width: 20px;
      height: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
  }

  .agora-rtc-video {
    position: absolute;
    z-index: 2;
    height: 100%;
    width: 100%;
  }

  .teacher-placeholder,
  .student-placeholder {
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 24px);
    position: absolute;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .student-placeholder::before,
  .teacher-placeholder::before {
    font-family: 'eduline' !important;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    content: '\e614';
    color: #909399;
    font-size: 54px;
  }
}

.preview-video {
  .agora-rtc-video {
    display: flex;
    flex: 1;
    height: 100%;
    width: 100%;
    left: 0;
    position: absolute;
    overflow: hidden;
  }
}

.agora-video-view.show-placeholder {
  .video-profile {
    z-index: 9;
    background-color: rgb(139, 144, 146);
  }
  .teacher-placeholder,
  .student-placeholder {
    z-index: 9;
  }
  .agora-rtc-video {
    visibility: hidden;
  }
}

.video-profile {
  z-index: 3;
  width: 100%;
  height: 24px;
  position: absolute;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  .account {
    margin-left: 10px;
    line-height: 14px;
    font-size: 12px;
    color: #fff;
  }
}

.agora-video-view {
  margin: 0px 3.33px;
  background-color: #666666;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  width: 237px;
  height: 132px;
  position: relative;
  overflow: hidden;
  .rotateY180deg {
    transform: rotateY(180deg);
  }

  .media-btn {
    display: flex;
    justify-content: space-between;
    margin-right: 10px;

    .icon {
      color: #fff;
      font-size: 14px;
      width: 20px;
      height: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
  }

  .agora-rtc-video {
    position: absolute;
    z-index: 2;
    height: 100%;
    width: 100%;
  }

  .teacher-placeholder,
  .student-placeholder {
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 24px);
    position: absolute;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .student-placeholder::before,
  .teacher-placeholder::before {
    font-family: 'eduline' !important;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    content: '\e614';
    color: #909399;
    font-size: 54px;
  }
}

.preview-video {
  .agora-rtc-video {
    display: flex;
    flex: 1;
    height: 100%;
    width: 100%;
    left: 0;
    position: absolute;
    overflow: hidden;
  }
}